Common spots on women include chloasma, freckles, age spots, etc. The causes of different diseases are different, and the common causes include heredity, sun exposure and hormonal changes. 1. Chloasma: The cause of chloasma is not yet clear. Women with chloasma may be related to heredity, ultraviolet irradiation, abnormal hormone level, etc. These factors cause damage to the skin barrier, increase the release of inflammatory cytokines, increase the activity of tyrosinase, and stimulate the secretion of melanocytes. In addition, abnormal levels of sex hormones can also lead to the occurrence of the disease, in which estrogen can stimulate melanocytes to secrete melanin particles, and progesterone can promote the transfer and spread of melanin particles. 2. Freckles: The cause of freckles is not yet clear, and female long freckles may be caused by heredity, sun exposure and other factors. Freckle is an autosomal dominant disease, while sun exposure can stimulate melanocytes to over-secrete melanin particles and aggravate the disease, so people with lighter skin color and family history of freckle are prone to develop the disease. 3. Age spots: also known as seborrheic keratosis, the etiology of this disease is not yet clear, and it is considered to be related to skin aging. Women with seborrheic keratosis are mainly considered to be related to factors such as skin aging, hereditary factors, gene mutation, etc., and ultraviolet light irradiation, viral infection, drugs and so on can induce the occurrence of this disease. Because of the variety of spots, so women with spots may also be other diseases, it is recommended that patients go to the hospital in a timely manner, a clear diagnosis and standardized treatment.